Curtain stretcher



D. R. 'LANDIS. CURTAIN STBETCHER. APPLICATION FILED JULY 14, 1921.

1 A035506. v Patented Jan. 17, 1922,

W QM D nie? 7E. Lana 1';

UNITED STATES FAT'ENT OFFICE.

CURTAIN STRETCHER.

Specification of Letters Patent.

Patented Jan. 17, 1922.

Application filed July 14, 1921. .Serial No. 484,578.

To all whom it may concern-.-

Be it known that I, DANIELE. LANDIS, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Curtain Stretchers, of which the following is a specification.

My invent-ion relates to improvements 111 curtain stretchers and more particularly to clamps for securing such frames in various positions of adjustment, the object of the invention being to provide a simple and efficient clamp of this character.

Other objects will appear hereinafter. The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which,

Fig. 1 is a top plan View of a curtain stretcher frame equipped with clamps embodying the invention.

Fig. 2 is an enlarged section taken'on line 22 of Fig. 1.

Fig. 3 is an end view corresponding to Fig 2.

Fig. 4: is a top plan view corresponding to Fig. 3, and

Fig- 5 is an enlarged section taken on line 5-5 of Fig. 1.

The preferred form of construction as illustrated in the drawings comprises a curtain stretcher frame made up of longitudinal side bars 6 and 7, end bars 8 and 9 and an intermediate brace bar 10 as shown. Each of the bars 6, 7, 8 and 9 is provided along its inner edge with curtain pins 11 for engagement with a curtain in the usual way. At one end the bar 8 is connected with the bar 6 by means of a clamping bolt 8' and also by a diagonal brace 12. At its other end the bar 8 is adjustably connected with the bar 7 by means of a clamp, embodying the invention herein.

This clamp comprises a rectangular frame 13 of a size to embrace both the bars 7 and 8 but provided with an internal web or flange 14 stiffening and strengthening the same and leaving space for passage of the bar 7. At its lower e'dge'the frame 13 is provided with a laterally extending lip 15 adapted to rest against the under side of the bar 8, and a corresponding opposed lip 16 is provided on the upper side of said 18 in the form of a substantially.U-shaped spring is mounted on said frame with its end 19 resting against the end of the clamping screw 17 and also bearing upon the bar 7. The other end of the spring 18 is perforated to engage over the clamp screw 17 and lugs 20 are provided on frame 13 to en gage the opposite sides of said spring to prevent swinging of said spring onsaid clamping screw. In this arrangement it will be observed that a suitable wear plate is provided for the clamp screw and also frictional engagement established with the adjustable bars of the, curtain stretcher which greatly facilitates adjustments there of. The specific form and arrangementof parts is a' simple and effective one for the purpose.

- The other and bar 9 of the curtain stretcher frame is secured to the bar 6 by a clamp identical with the clamp already described, and stop block 21 is provided on said bar to rest against the inner edge of the bar 6. By this arrangement the bar 9 will be adequately held in place by a single clamp, but if desired another clamp for the other end thereof may be employed.

The intermediate brace bar 10 is connected with the bar 6 by means of diagonal braces 22 and with the bar 7 by means of a for the intermediate bar the frame 13 is broken away at its upper inner corner to provide a gap 13' giving access to the curtain ins 11. Otherwise the construction is identical with the clamp already described.

WVhile" I have illustrated and described the preferred form of construction for carrylng my invention into effect, this is capable of variation and modification without departing from the spirit of the inven tion. .I, therefore, do not wish to be limited to the precise details of the construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is 2- 1.. In combination with a curtain stretcher havin cooperating side and cross members slidab y mounted at thgir junctions; a clamping frame embracing one of said members; lips on said frame embracing both of said members; a clamping screw in one of said lips arran ed to bear against one of said members; an a substantially U-shaped sprin'g resting on said one lip and perforated to engage said clamping screw, the other end of said spring passing through said frame and resting against the end of a said clamping screw, substantially as described.

52. In combination with a curtain stretcher havin cooperating side and cross members slidab y mounted at their junctions; a clam ing frame embracing one of said mom iers; lips on said frame embracing both of said members; a clamping screw in one of said lips arranged to b-ear against one of said members; a substantially U-shaped spring resting on said one lip and perfo rated to engage said clamping screw, the other end of said spring passnm through said frame and resting against the end of said clamping screw; and lugs on said frame engaging the sides of said spring to preventswinging thereof on said screw, sub stantially as escribed.

3. A clamp for curtain stretchers and the like comprising a frame; opposed lips on opposite sides of said frame; a clamping screw threaded in one, of said lips; a substantially U-shaped spring resting on said one lip and perforated to engage said clamping screw, the other end of said spring passing through said frame and resting against the end of said clamping screw, substantially as described.

4. A clamp for curtain stretchers and the passing through said frame and resting' against the end of said clamping screw; and lugs on said frame engaging the sidesof said spring to prevent swinging'thereof on said screw, substantially as described.

5.111 a clamp for curtain stretchers and the like, a frame; a clamping screw on said frame; a spring member perforatedto engage said clamping screw and arranged to contact with a member clamped in said frame; and lugs on said frame engaging the sides of said springto prevent swinging thereof 011 said screw, substantially as described. V r p In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

y DANIEL LANDIS.

Witnesses: s

JOSHUA R. H. Porrs,

CLARnNcnE. THREEDY. 

